1074 宇宙无敌加法器 (20分)

测试点1，3，5

测试点1，3
所有数字加完之后，若有进位，还要多输出一位1
测试点5
两个数字为0的情况

代码

#include <iostream>
#include <vector>
#include <string>
#include <cstdio>
//scanf printf防止超时
#include <algorithm>
//vector的sort
#include <sstream>
//转换
using namespace std;

#include<iomanip>
//精度

#include<cmath>
//round四舍五入取整



int main()
{
    string str1,pat1,pat2;
    cin>>str1>>pat1>>pat2;
    if(pat1.length()<pat2.length())
    {
        string temp=pat1;
        pat1=pat2;
        pat2=temp;
    }
    int len=pat1.length();
    int len1=pat2.length();
    int flag=0;
    vector<int> res;

//cout<<len<<len1<<endl;
    for(int i=0;i<str1.length();i++)
    {
        int sum=0;
        int judge=str1[str1.length()-1-i]-‘0‘;
        if(judge==0)
            judge=10;
//cout<<judge<<endl;
        if(i<len)
        {
            if(i<len1)
            {
                sum+=pat1[pat1.length()-1-i]-‘0‘;
                sum+=pat2[pat2.length()-1-i]-‘0‘;
                sum+=flag;
                if(sum>=judge)
                {
                    flag=1;
                    sum-=judge;
                    //cout<<"flag"<<flag<<endl;
                }else
                {
                    flag=0;
                }

            }else
            {
                sum+=pat1[pat1.length()-1-i]-‘0‘;
                sum+=flag;

                if(sum>=judge)
                {
                    flag=1;
                    sum-=judge;
                }else
                {
                    flag=0;
                }

            }
        }
        
        res.push_back(sum);
    }
//测试点1，3
    if(flag==1)
        res.push_back(1);
    int index;
    for(index=res.size()-1;index>=0;index--)
    {
        if(res[index]!=0)
            break;
    }

    while(index>=0)
    {
        cout<<res[index];
        index--;
    }
//测试点5
    stringstream ss;
    int p1,p2;
    ss<<pat1;
    ss>>p1;
    ss.clear();
    ss<<pat2;
    ss>>p2;
    if(p2==0&&p1==0)
        cout<<"0";

    cout<<endl;
    return 0;
}

PAT(Basic Level) Practice : 1074 宇宙无敌加法器 (20分)

原文：https://www.cnblogs.com/zchq/p/13755675.html